Sound-box for talking-machines.



A. FISCHER.

SOUND BOX FOR TALKING MACHINES. APPLIOATION FILBDJOUT. 2a, 1908.

I QQQ SEG I Patented Dec. '7, 1909.

ALEX FISCHER, OF KENSINGTON, LONDON, ENGLAND.

SOUND-BOX FOR TALKING-MACHINES.

Original application filed February 3,

To all-whom a may concern:

Be it known that I, Annx FISCHER, a subject of the King of England, residing at 8 Maclisc road, Kensington, in the county of London, England, have invented certain new and useful Improvements in the Construction of Hound-Boxes for 'ialking-h iachines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in the construction of sound boxes for alking machines of the disk type and refers to certain details forming part of my former application for sound boxes filed February 3rd, 1908, Serial No. 414070, of which the present application is a division.

The present application refers particularly to the construction of the backs 01' sound boxes and to means for connecting the sound box to the tone arm or trumpet.

In order that my said invention may be better understood, I will proceed to describe the same with reference to the drawing accompanying this specification, in which Figure 1 shows a side elevation of a sound box partly in section; Fig. 2 shows plan of same; Fig. 3 shows a modified form of the invention.

The same letters of reference are employed to denote the same parts in all the views:

a shows the back plate of the sound box. This back plate is provided with an annular groove 2), into which a rubber. washer 0 (preferably tubular) is placed.

d, 6! show two small brackets attached to the back a.

c is a flanged tube formin the sound exit tube fixed on to the back 0 the sound box by center screws f screwing through the brackets 03 and into two center holes 9 in the flange of the tube 6. In this position the flange i of the ring 6 presses tightly against the rubber ring 0, making a flexible sound tight oint, which will allow the sound box a small turh around its vertical axis, the center screws forming the turning axis.

On the tube e I form a boss 2' into which a spring pin 70 is fitted, such spring pin being provided with a flange m to limit its i Specification of Letters Patent.

1908, Serial No. 414,070. Divided and this application filed October Serial No. 459,207.

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action, so that the bottom of the pin may enter a hole in the tone arm or trumpet in order to attach the sound box firmly thereto. n is a cap screwed on the boss 2' to hold the spring in position.

Fig. 3 shows a simplified form of spring for the pin. Instead of having the spiral spring and cap a screwed to the boss 6, I have a rubber ring 0 passing around the tube e and over the head of the pin. At its lower end the spring pin is so formed that the sound box can only be turned in one direction, suitable means being employed to prevent the spring pin from turning around its vertical axis. Two holes (preferably opposite one another) are provided on the small end of the tone arm, on to which the sound box is. pushed. In these holes the pin 70, springs, which will lock the sound box to the tone arm in the playing position, and with a half turn the sound box will be brought in position for changing the needle easily. The spring pin at its lower end is cut on the slant and will allow the sound box to be turned around in the direction as indicated by the arrow (Fig. 3), while a turn in the opposite direction will be impossible. By

turing the sound box the pin held down by the spiral springs and cap or rubber ring will be pushed up, or slide up and ride on the top of the sound arm until the hole is reached again. An annular shallow groove may be provided on the tone arm connecting the two holes to form a guide for the pin to prevent the sound box from slipping off when not locked in the holes.

WVhat I claim and desire to secure by Letters Patent of the United States of America 1s:-

1.. The combination of a sound box having brackets, a flexible washer in contact with said box, a flanged tube hearing at one end on said washer, and screws passing through said brackets and into said tube, substantially as described.

2. The combination of a sound box having brackets and a groove thereon, a flexible washer in said groove, a flanged tube bearing on said washer, and screws passing through said brackets and into said tube, substantially as described.

3. The combination of a sound box having bracke s and a groove on its back, a flexible washer in said groove, a flanged tube bearing on said Washer, screws passing through said brackets and into said tube, and a spring-pressed pin carried by said tube, substantially as described.

4:. The combination of a sound box having brackets, a flexible washer in contact with said box, a flanged tube bearing at one end on said washer, screws passing through a hole in said tube, and a rubber ring passing around said tube and pressing-said pin in 10 Ward, substantially as descnbed.

In testimony whereof, I aflix my signature, 1n presence of two Witnesses.

ALEX FISCHER.

Witnesses E. ViDAL, L. Smmwxus. 

